package com.wj.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.wj.common.BaseContext;
import com.wj.common.CustomException;
import com.wj.entity.*;
import com.wj.mapper.OrderMapper;
import com.wj.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Slf4j
@Service
//@Transactional
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     * @param orders
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentId();

        //获取当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);
        log.info("shoppingCarts:{}",shoppingCarts);

        if (shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomException("购物车为空，不能下单！");
        }

        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);

        if (addressBook == null){
            throw new CustomException("地址信息有误，不能下单！");
        }

        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails =shoppingCarts.stream().map((item)->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setOrderId(orderId);
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setNumber(item.getNumber());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        orders.setId(orderId);
        orders.setNumber(String.valueOf(orderId));//设置订单号
        orders.setStatus(2);//设置派送状态
        orders.setUserId(userId);//设置用户id
        orders.setOrderTime(LocalDateTime.now());//设置下单时间
        orders.setCheckoutTime(LocalDateTime.now());//设置结账时间
        orders.setAmount(new BigDecimal(amount.get()));//设置实收总金额
        orders.setPhone(user.getPhone());
        orders.setUserName(user.getName());//设置下单用户名
        orders.setConsignee(addressBook.getConsignee());//设置收货人
        orders.setAddress(addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName()
                          + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                          + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName()));//设置收获地址
        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCartService.remove(queryWrapper);
    }
}
